[1] This law will require landlords to guarantee that any new tenancy from 1 July 2019 must be either properly insulated or contain a heating source able to make the home warm and dry.

The Healthy Homes standards will cover heating, insulation, ventilation, draught stopping, drainage and moisture.

[1][3][2] Twyford's Healthy Homes Guarantee Bill was first drawn from the Parliamentary ballot in 2013, but was struck down at its first reading.

Then-Labour leader Andrew Little introduced a second version, which made it through its second reading with the votes of every party except ACT and National.

The Healthy Homes Guarantee Bill became law after receiving royal assent on 4 December 2017.